Carbureter.



PATENTE)4 AUG. zo, 1907.

[NVE-NTM?7 1r BMAXWELL H.l B. MAXWELL.

CARBURETER APPLIOATION FILED 0GT.9, 1905.

HARRY B. MAx'wLL, 0F ROME',NEW YORK.

CARB-URETER.

Speciiication of Letters Patent.

Patented Aug. 20, 1907.

Appleman mea 'october o, 1905.,v .serial No. 2s1.s71.

Toall 'whom't may concern."

Beit known that HARRY B. MAXWELL, .of Rome, in the county of Oneida andState of New York,- has in' Avented certain new and useful yImprovementsin'Carburetcrs; and he does hereby declare that the followving is vafull, clear, and exact ldescription thereof,

which will. enable others skilled in the art to lwhich it v appertainsto make and use the same, reference lbeing had toy the'accompanyingdrawings, and to the` letters of reference marked thereon, whichformpart of this' specification. u i, Y I

u The object of my present invention i's to provide a carbureter forexplosive engines, wherein provision is made for obviating-f1ooding whenthe carbureterV is thrown outof its'normal horizontal position, asfrequently occurs in automobiles and` small boats.'A

-The further object is to provide a carbureter of com-` pact,'.zsimpleand efficient construction, capable of producingth'e best mixture undera large variety lof conditions of use.

Figure 1 shows aside elevation .of the carbureter, a smallr portionbeingbroken off to reduce' the size of the figure. Figf2 shows in themain aside elevation, as'seen in position on a quarter turn, as shown inFig'. l, a portion being shown-in section to better illustrate theVconstruction. Fig. 3 is a sectional view taken substantially on lineA--B of FiglHZ Fig. 4 is a side elevation of the throttling valverernoved from the casi-ng., Fig. 5 is another detail view of the sameshown at a position at right angles to that of thev View shown in Fig.4.. Fig. 6 is a plan View oi the sam'e 'throttling'valve v i Referringto the reference letters and yfigures* ina more particular descriptionof the device, lindicates the cylinderbody of the carbureter,' which inthe main constitutes a -fluid'recept'acle and has axially therethroughan opening affording a passage for the air for the mixture. The upperand lower ends of the receptacle'casing 1 are closed by heads 'v2 and 3,each provided with a passage coinciding with the axial passage throughthe casing l. To the head 2`is attached, preferably by .means of flangecouplings 4,' the pipe 5 extending to the explosive engine. lThis pipeconnects with i through-the casing.v i

Extending radially into the casing 1, which is p reff erably round, isthe valve 4casing 6, which will preferably be formed integral -with thepart 1 andextend somewhat beyond the center or axis of the casing andsufficiently to' allow .the throttlingyalve 7 to takea position with its'opening 8 laxially in the casing l.,

and so as to 4register'with the axial opening .through the casing 1;:The valve casing 6 is 4closed at its outer end by a head 9, which isremovable Vto allow thevalve 7 to be removed or returned to its positionin the case, and the valve is provided `with avalve ystem 10 ex? thepassage e'xtending -axiallyv tending to the outer side-of, the head 9,where it is provided with a lever 11 by means of which the operationAshown in the side elevation of Fig.A 4. TheV discharge end of thecarbureting nozzle 12 is located centrally within the valve 7 and alsocentrally within the' valve axial passage through the receptacle 1', andcommuni- Cates with 'the interior of the receptacle l through thepassage d shown in dotted lines in Fig. 1, together with the severalsmall pierforations .b in the bottom of the'recepta'clealso shown indotted lines in Fig. 1 and in plan view in Fig. 3. The passage a isvprovided forin'the thickened bottonlhead 3 of the receptacle,

Aand this passage is controlled vby'a needle valve 14 shown 'indott'edlines in Fig. l, the same having on the outer end of thestem a head 15,by means of which it may be operated.

In order to catch any drip from the nozzle 12, there is vprovided belowthe lower end 'of the'opening,

through thecasing, a pan l5. This pan may be supported by a stenrlengaging withl the lower end of the lnozzle 12, and, in order to give itmore stability, provided with posts 17 which will strike against theunder side of the receptacle .head and prevent undue strain being placedon the stern 16 from a pressure or blow'on the pan. Within thereceptacle 1, which may also be termed a float chamber, there isprovided a ilo'at 1.8.l This`'loat is preferably of cork and cut out,

, asl shown, to provide clearance around the valve chamber 6. The fioat18 is attached to the swinging end of an arm 19, which arm is pivoted at20pin an extension 'la of the case.- The arm 19 carries a socket 19'Lwhich receives a cork 21,` which cork acts as it closureLwhen the floatis in.upper position, for the nozzle 2'2.v The nozzle 2.2 isscrew-threaded through the upper wall of the caseextension lA and hasconnected therewith a tube 23, which supplies the carbureting fluid.`

-When carbureting fluid. hasentered the (loer chamber -to suficientdepth to operate the float, the' corkk stopper 21 will engage with andclose thel lower end of the nozzle '22, and when the float takes a lowerposiltion by reason of a portion ofthe' contents of the float lthatthisV level will ordinarily be4 a trifle lower than the discharge endofthe carbureting nozzle 12. The discharge end-'of the carburetingnozzle 41,2),i'eing thusy located in the center of the surface-tttrenuid in' the,

zle by throwing the carburetor out of its normal horizontal plane, forwhile the depth of the fluid may increase in one side of the oat chamberand decrease in the other side, this does not affect the central pointat which the carbureting nozzle is arranged. The valve 7 is providedwith a cut-put, as shown at 7, in one of its Walls so as not tointerfere with the carbureting nozzle 12, which extends up the centerof'the passage Way, through the-carbureter; In other words,l the cut-out7 allows the valve 7 to be turned to its closed position, whichotherwise would be prevented by the nozzle. l By reason of the opening 8through the valve 7 being larger on the receiving side than on thedischarge `side When the valve 8 is nearly closed, the operation of thecurrent of air as it picks up the carbureting fluid from the end of thenozzle 12 is somewhat peculiar; While the air passing through the morerestricted opening at the discharge side of the valve 7 may cause thecurrent of air toipass rapidly on account of the decrease in 'size ofthe opening above the nozzle, the cur- .rent of air around the nozzlepasses less rapidly and thereby produces less suction on the nozzle thanmight otherwise occur. In this Way this carbureter servesto some extentto proportionthe amount of carbureting fluid received from the nozzle 124to the amount required whenthe passage is throttled more vor less.

. It will, be noted that anyr drip from the nozzle 1 which may be caughtin the pan 15'will be absorbed by the air which passes over `the edgesofthe pan, and thence to the axial opening through the carburetor, asshown by the arrows in Fig. 2. This pan 15 in startconstruction shownmay be made without departingl from the spirit oi my invention.

What I claim as new and desire to secure by Letters Patent is:

1. The combination in va carburetei ofl a float chamber having' an axialpassage through the same, a valve 1ocated in and arranged forthrottlingthe said'passage at two points. a carbureting' nozzle arrangedwithin said passage between the two throttling points and communicitingwith the interior ot the iioat chamber, means for spplylnsr carbureterfluid to the float chamber` a float, and n valve controlled by theI'loat and controlling the supply to the float chamber. substantially asset forth.

2. "lbe combination in a carbureter of a hollow body' constituting afloat chamber having an axial passage therethrough and a radial chamberfrom said axial passage. ot' a valve arranged in the radial chamber andadapted to throttle the' axial passage at two points, the carburetlng:nozzle arranged.\vithln said passage and between the two 'throttlingpoints and communicating with the interior of the iloat chamber, -meanst'or supplylnacarluireting fluid to the float chamber. a float in thefloafchamber. and a valve controlled b y thc lloat and controlling: thesupply to the float chamber. substantially as set forth.

In witness whereof, 1 have all'ixed my sigg-nature. in

y presence of two witnesses, this 5th day of Oct. 1905.

HARRY B. MAX\\'ELL.

\Vitne sses|;

[inox lL. Au'ruun, E. S. Hnssn.

